<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="信息描述">
          <el-tag type="info">excel模板说明</el-tag>
          <el-tag>
              <i class="ol icon download" />
              <a :href="OSS_PATH+'/subject/Excel%E6%A8%A1%E6%9D%BF.xlsx'">点击下载模板</a>
          </el-tag>
      </el-form-item>


      <el-form-item label="选择Excel">
            <el-upload
                ref="upload"
                :auto-upload="false"
                :on-success="fileUploadSuccess"
                :on-error="fileUploadError"
                :disabled="importBtnDisabled"
                :limit="1"
                :action="BASE_API+'/eduservice/subject/insertSubject'"
                name="file"
                accept="application/vue.ms-excel">
                <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
                <el-button
                    :loading="Loading"
                    style="margin-left: 10px;"
                    size="small"
                    type="success"
                    @click="submitUpload">{{ fileUploadBtnText }}</el-button>
            </el-upload>
      </el-form-item>
    </el-form>

  </div>
</template>


<script>
export default {
    data() {
        return {
            BASE_API: process.env.BASE_API, // 接口API地址
            OSS_PATH: "https://jiyue-edu.oss-cn-shenzhen.aliyuncs.com", // 阿里云OSS地址
            fileUploadBtnText: "上传到服务器", // 按钮文字
            importBtnDisabled: false, // 按钮是否禁用
            loading: false
        }
    },
    created() {
        
    },
    methods: {
        // 点击按钮，上传文件到接口里面
        submitUpload() {
            this.importBtnDisabled = true
            this.loading = true
            // 底层使用js：document.getElementById("upload").sumbit()
            this.$refs.upload.submit()
        },
        // 上传成功
        fileUploadSuccess(data) {
            console.log(data)
            this.loading = false
            this.$message({
                type: 'success',
                message: '添加课程分类'+data.message // 备注：data.message=成功
            })
            this.$router.push({path: '/subject/table'})
        },
        // 上传失败
        fileUploadError() {
            this.$message({
                type: 'error',
                message: '添加课程失败'
            })
        },
    }
}
</script>